persulfate
Very RareTechnical/Scientific
Definition
Meaning
A salt or ester of persulfuric acid, containing the S₂O₈²⁻ anion.
An oxidizing agent, often ammonium persulfate or potassium persulfate, used in chemical processes such as polymer initiation, etching, and bleaching.
Linguistics
Semantic Notes
This term is strictly a technical/chemical noun. It refers to specific inorganic compounds and is not used in non-scientific contexts. It is a hyponym of the broader class 'sulfates'.
Dialectal Variation
British vs American Usage
Differences
Spelling is consistent. Usage is identical in technical contexts. In British English, the older term 'peroxydisulfate' is often used synonymously and may be preferred in IUPAC nomenclature.
Connotations
No difference in connotation; purely technical.
Frequency
Equally rare in both dialects, confined to chemistry, materials science, and related industrial fields.
Vocabulary
Collocations
Grammar
Valency Patterns
[persulfate] + [noun] (e.g., persulfate oxidation)[adjective] + [persulfate] (e.g., ammonium persulfate)Vocabulary
Synonyms
Neutral
Weak
Vocabulary
Antonyms
Usage
Context Usage
Business
Used only in contexts related to chemical manufacturing or supply, e.g., 'The price of ammonium persulfate has risen.'
Academic
Used in chemistry, materials science, and environmental engineering papers, e.g., 'Degradation was achieved via persulfate activation.'
Everyday
Virtually never used.
Technical
The primary domain of use, e.g., 'The radical polymerization was initiated with potassium persulfate.'
Examples
By Part of Speech
adjective
British English
- The persulfate concentration was critical.
American English
- A persulfate-based initiator was used.
Examples
By CEFR Level
- Persulfates are strong oxidizing agents used in industry.
- Ammonium persulfate is a common laboratory chemical.
- The advanced oxidation process relies on the activation of persulfate to generate sulfate radicals.
- Kinetic studies showed the degradation pathway involved both direct persulfate oxidation and radical-mediated mechanisms.
Learning
Memory Aids
Mnemonic
Think: PERoxide + SULFATE = PERSULFATE. It's a sulfate with extra oxygen (peroxo group), making it a powerful oxidizer.
Conceptual Metaphor
A chemical 'battery' or 'spark plug' that provides aggressive oxidative energy to start or drive a reaction.
Watch out
Common Pitfalls
Translation Traps (for Russian speakers)
- Do not confuse with 'сульфат' (sulfate). The prefix 'per-' indicates a peroxide, so it is 'пероксодисульфат' or 'персульфат'.
- Avoid literal decomposition into 'per-' (through) and 'sulfate'.
Common Mistakes
- Misspelling as 'persulphate' (though 'sulphate' is BrE, the 'per-' prefix standardises to 'sulfate').
- Confusing it with 'perchlorate' or 'sulfate'.
- Using it as a verb, e.g., 'to persulfate' (incorrect).
Practice
Quiz
What is the primary chemical characteristic of a persulfate?
FAQ
Frequently Asked Questions
No. A persulfate (peroxydisulfate) contains a peroxide linkage (O-O) and is a much stronger oxidizing agent than a regular sulfate.
It is used in polymer and plastics production (as an initiator), electronics (for etching printed circuit boards), hair bleaching products, and environmental remediation (to break down pollutants).
No, it is strictly a noun. There is no standard verb form 'to persulfate' in accepted chemical terminology.
They are strong oxidizers, can cause fires if mixed with combustibles, and may cause skin, eye, and respiratory irritation. Proper handling with PPE is essential.